Mobile-friendly space sites and applications: an unexplored world?

Many space tweeps use smartphones or mobile devices to keep in touch via Twitter with fellow enthusiasts, or get the latest news on their favorite missions. I explained here, for example, how to view NASA TV images with a mobile phone. Given the iPhone success and increased mobile use of popular sites such as Facebook , this trend is not limited to space tweeps. Yet there are very few mobile-friendly sites or smartphone applications devoted to space.

Still, the mobile space world is still mostly empty — no pun intended. As far as I know, no space agency provides a mobile version of its main site. These may be among the reasons why The Launch Pad, the Google Lunar X PRIZE blog, posted a call for ideas for a space-related smartphone application.

What is your experience? As a space geek, can you share links to your favorite smartphone applications or mobile-optimized sites? You are encouraged to leave comments. I’d like this post to collect additional information from space tweeps.